I'm totally new to this, never had or used dual displays before, much less have a network on board.
Neither 1222 plotter has anything for charts, other than very basic worldwide basemap.

- If I buy a single G3 Vision card, plug into display #1 SD slot, download(?), can I then display those G3 charts on either plotter? I assume they only allow you to load charts into 1 device, not 2.

- Assuming all of these devices are either on NMEA2000 or the Garmin Network, once I have a map card, should I be able to configure and display whatever I need on either plotter (charts, sonar, stereo, VHF, radar, engine data, trim, future autopilot)?